Sanding block



J. P. QUINN Jan. 10, 1933.

SANDING BLOCK Filed March 25, 1930 Patented Jan. 10, 1933 UNITED STATES JOHN P. QU 'INN, OF SIbUX CITY, IOWA SANDING BLOCK a lication filed March 25, 1930. Serial No. 438,712.

The present invention appertains to sanding blocks, and its prime object is to provide simple means for holding sandpaper, emery cloth, wool, velvet, drawing or writing paper, blotting paper, flexible stamping plates and the like, firmly about the periphery of same when so used. 7

With the above and other objects in View, the invention consists of the constructlon, combination and arrangement of parts, herein illustrated, described and claimed.

In the drawing,-'

Figure 1 is a perspective view of a preferred form of my invention.-

Figure 2 shows an end view thereof.

Figure 3 shows a preferred cut of sheet material so used in the construction of Figures 1 and 2.

Figure 4.- is a simplified form ofthe construction.

Figure 5 is a perspective view of a handle detached from the sander.

In general the invention consists of four parts; which comprises: a U-shaped member 5 indicated in the drawing by the character 'A; two blocks, these of which are usually composed of wood, indicated in the drawing by the character B; and a cam indicated in the drawing by the character C.

The U-shaped member A is made up of. a single piece of resilient sheet material, preferably a good grade of medium heavy spring sheet steel. In the drawing it may be seen that the said member A is substantially U- shaped in end elevation so as to include two plates or arms and 11, which are substantially parallel to each other. The blocks B are rectangular in shape and relatively alike. In combination with the cam C is included a lever 12, said lever and the cam C are formed from a single piece of rod or heavy wire, which is shaped substantially to the form as shown in the drawing.

The U-shaped member'A is positioned between the two blocks B, and the cam G is positioned between thearms lOand 11- of the U-shaped member A. Both the blocks B and the cam C are carried'by the said member A. Referring to the drawing in detail it'will be'seen that the end of the arms 10 and 11, and

a portion of the sides adjacent the said ends thereof,- arerprovided with flanges, some of which are turned outwardly as shown at 13, 14, 15 and 16, and others of which are turned inwardly as at 17 (Figures 1 and 2). vThe outwardly turned flanges 13 to 16 inclusive, serve as a means to secure the blocks B to the U-shaped member A, whereby these flanges surrounds one edge of each of the blocks B; and are provided with holes whereforesuitable nails shown at 18 (Figures 1 and 2), are driven through them and into the said blocks. The inwardly turned flanges 17 are at the end of the arm 10 only and are curved so as to be clasped about the bearing portions of the cam G, whereby through this arrangement the said cam is pivotally held by the U-shaped member A, and positioned between the arms 10 and 11 thereof as shown. I

The U-shapedmember A is formed from a flat piece of suitable sheet material,- which 1s cut substantially to the form shown in Figure 3; like numerals in Figure 3 represent like parts in Figures land 2. The manner of constructing the said member A from the form shown in Figure 3, to the form shown in Figures 1 and 2 is thought to be evident fromthe drawing. i The U-shaped member A is secured to the blocks B at a point between them adjacent" to one side thereof; on the opposite side between the said blocks thereof is a pair of opposed jaws, designated by the numerals 19 and 20', said jaws are formed by merely a pair of cleats being secured oneto each one of the block's B and facing each other as shown. f I

Referring now more particularly to the operation, the arrows shown in Figures 1 and 2 indicate the direction ofthe spring tension of the member A so exerted in the blocks B; said tension is always inwardly between the eX- tendedarms 10 and 11; the said arms may be spread or released by mai'iipulating the lever 12 which rocks the cam C the said cam being formed so as to spread the blocks B apartto the position shown in Figure 1;' or release them to the. position shown in-Fi'gure 2'. A st'u-d 21- projects from one of the said blocks and positioned so as to form a stop for the lever 12 as shown in Figure 1.

The construction of the sander is such, that the jaws 19 and 20 are atrifle open when the U-shaped member A is released as shown in Figure 2, but whereupon in spreading the arms 10 and 11 apart will first close the said jaws, and from thence expand the sander. It now may be obvious from the description, that by placing a piece of sandpaper (herein indicated at 22 Figure 2) or the like about the sander, with the ends thereof being inturned between the said jaws, that in performing the above described operation, will first grip the said inturned ends, and the expansion will take up the slack in the sanding sheet'thereabout. Thus the sander will then be ready for use.

Figure 4 shows .a simplified form, which depicts the extended arms as at 23 and 24 in a similar U-shaped member, here indicated by the character D, which is turned opposite to the U-shaped member A and secured to the blocks 25- and 26 by the outwardly turned flanges 27 although the principle is the same as in Figures 1 and 2, the tension is reverse to the U-shaped memberA, but is carried out the same in the blocks 25 and 26: 28 are 111- turned extensions of the arms of the said U- shaped member D, which is formed integral therewith and makes up the jaws; 29 is the cam; 30 is the lever; 31 is the stud which the said lever rests against and 32 staples, of which there are at least two, one on the opposite side from view, which are driven into the block 25 and astride bearing portions of the said cam 29, and holds the said cam in position as shown.

The invention is now considered complete for most purposes, but if desired it may be further provided with a handle; which is in particular more useful for printing or stamping purposes. A perspective view of a handle is shown in Figure 5. The complete handle is made up of three parts, the main part is herein described as the handle E, the remaining two parts are the end supports designated by the characters 33. Figure 2 shows an end view of the said handle attached to the sander.

The handle E is formed from a single piece 'of sheet material of rectangular shape, by

rolling two of its opposite side edges down and inwardly to the form shown in the end view Figure 2. Thesaid inwardly turned edges form two open receptacles shown at 34, which will hereinafter be referred to.-

The two end supports 33 are substantially alike, and are made up of short strips of sheet material. One end of each of the said supports are shaped to conform to the under side of the handle E as shown in Figure 2, and welded or glued (according to the material they are composed of) thereto; the opposite ends thereof of the said supports are secured to the sander; whereby one of the blocks is received between the two said supports and held fast by screws 35, as shown in Figure 2; (there being holes through the said supports for the said screws to pass).

The receptacles 34 above referred to, reach full length ofthe handle E and are open at both ends. These receptacles will serve as a holder for any such material or articles, that when placed therein would not be subject to slide out, generally such as small rolls of paper that can be used with the sander.

The invention is not only useful for sanding and stamping purposes etc., but is very useful as a holder for writing, drawing or tracing paper. 'In this it is most useful for children in that'it serves as a means for holding the paper, secure, and is especially suitable for outside work. WVhen tracing work is to be performed, the subject to betraced is placed under the tracing paper in preparation to placing the said paper about the sander.

The invention will also serve as a means to sharpen tools by placing a preferred grade of abrasive sheet material, or other suitable sheet material (in accordance to the work required), about the sander; in this the sander is preferred much longer and nar rower than as shown in the drawing.

Some changes may be made in the construction and arrangement of the parts of my invention without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims, any modified forms of structure or use of mechanical equivalents, which may be reasonablyincluded within their scope.

I claim as my invention :7 r

1. In a device of the character described, a pair ofmembers together forming a complete peripheral surface to supporta sheet,

said members being connected substantially centrally of their peripheral surface by a spring element for combined rocking and expanding movement relative to each other, coacting jaws formed on adjacentportions of said members, and means acting between adjacent portions of said members, opposite said jaws,to move the members apart.

jacent portions of said members, opposite said jaws,to move the members apart, said cam pivotally connected withone of the said members and inv contact with the other, and

, means to actuate the said cam.

,3. In a device of the character described,

a pair of members together forming a com plete peripheral surface to support a, sheet, said members being connected substantially centrally of their peripheral surface by a spring element for combined rocking and expanding movement relative to each other, 00- acting jaws formed on adjacent portions of said members, and a cam acting between adjacent portions of said members, opposite said jaws, to move the members apart, said spring element formed of sheet material, being substantially U-shaped in end elevation with outwardly turned portions partly surrounding the said members and inwardly turned port-ions forming bearings for the said cam.

Signed this 22nd day of March, 1930, in the county of WVoodbury and State of Iowa.

JOHN P. QUINN. 

